Graham is the first plus-size model to be featured on the cover of the magazine.

Tiegs told E! News she disagrees with that decision.

“I don’t like that we’re talking about full-figured women because it’s glamorizing them because your waist should be smaller than 35 [inches]. That’s what Dr. Oz said, and I’m sticking to it,” she explained in the interview. “No, I don’t think it’s healthy. Her face is beautiful. Beautiful. But I don’t think it’s healthy in the long run.”

Graham — who has not responded to Tiegs’ comments — took to Instagram after learning she would be featured on the cover of the iconic magazine.

“Truly speechless!!! This cover is for every woman who felt like she wasn’t beautiful enough because of her size. You can do and achieve anything you put your mind to,” she wrote on her post.

“I would like to clarify my thoughts regarding bodyweight,” Tiegs wrote. “I don’t think being anorexic, bulimic or overweight are healthy. All of these can be connected to serious health issues. I want everyone to be as healthy as they can be.”